/src/Python-3.8.3/Objects/methodobject.c

Source

/* Method object implementation */

#include "Python.h"
#include "pycore_object.h"
#include "pycore_pymem.h"
#include "pycore_pystate.h"
#include "structmember.h"

/* Free list for method objects to safe malloc/free overhead
 * The m_self element is used to chain the objects.
 */
static PyCFunctionObject *free_list = NULL;
static int numfree = 0;
#ifndef PyCFunction_MAXFREELIST
#define PyCFunction_MAXFREELIST 256
#endif

/* undefine macro trampoline to PyCFunction_NewEx */
#undef PyCFunction_New

/* Forward declarations */
static PyObject * cfunction_vectorcall_FASTCALL(
    PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames);
static PyObject * cfunction_vectorcall_FASTCALL_KEYWORDS(
    PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames);
static PyObject * cfunction_vectorcall_NOARGS(
    PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames);
static PyObject * cfunction_vectorcall_O(
    PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames);


PyObject *
PyCFunction_New(PyMethodDef *ml, PyObject *self)
{
    return PyCFunction_NewEx(ml, self, NULL);
}

PyObject *
PyCFunction_NewEx(PyMethodDef *ml, PyObject *self, PyObject *module)
{
    /* Figure out correct vectorcall function to use */
    vectorcallfunc vectorcall;
    switch (ml->ml_flags & (METH_VARARGS | METH_FASTCALL | METH_NOARGS | METH_O | METH_KEYWORDS))
    {
        case METH_VARARGS:
        case METH_VARARGS | METH_KEYWORDS:
            /* For METH_VARARGS functions, it's more efficient to use tp_call
             * instead of vectorcall. */
            vectorcall = NULL;
            break;
        case METH_FASTCALL:
            vectorcall = cfunction_vectorcall_FASTCALL;
            break;
        case METH_FASTCALL | METH_KEYWORDS:
            vectorcall = cfunction_vectorcall_FASTCALL_KEYWORDS;
            break;
        case METH_NOARGS:
            vectorcall = cfunction_vectorcall_NOARGS;
            break;
        case METH_O:
            vectorcall = cfunction_vectorcall_O;
            break;
        default:
            PyErr_Format(PyExc_SystemError,
                         "%s() method: bad call flags", ml->ml_name);
            return NULL;
    }

    PyCFunctionObject *op;
    op = free_list;
    if (op != NULL) {
        free_list = (PyCFunctionObject *)(op->m_self);
        (void)PyObject_INIT(op, &PyCFunction_Type);
        numfree--;
    }
    else {
        op = PyObject_GC_New(PyCFunctionObject, &PyCFunction_Type);
        if (op == NULL)
            return NULL;
    }
    op->m_weakreflist = NULL;
    op->m_ml = ml;
    Py_XINCREF(self);
    op->m_self = self;
    Py_XINCREF(module);
    op->m_module = module;
    op->vectorcall = vectorcall;
    _PyObject_GC_TRACK(op);
    return (PyObject *)op;
}

PyCFunction
PyCFunction_GetFunction(PyObject *op)
{
    if (!PyCFunction_Check(op)) {
        PyErr_BadInternalCall();
        return NULL;
    }
    return PyCFunction_GET_FUNCTION(op);
}

PyObject *
PyCFunction_GetSelf(PyObject *op)
{
    if (!PyCFunction_Check(op)) {
        PyErr_BadInternalCall();
        return NULL;
    }
    return PyCFunction_GET_SELF(op);
}

int
PyCFunction_GetFlags(PyObject *op)
{
    if (!PyCFunction_Check(op)) {
        PyErr_BadInternalCall();
        return -1;
    }
    return PyCFunction_GET_FLAGS(op);
}

/* Methods (the standard built-in methods, that is) */

static void
meth_dealloc(PyCFunctionObject *m)
{
    _PyObject_GC_UNTRACK(m);
    if (m->m_weakreflist != NULL) {
        PyObject_ClearWeakRefs((PyObject*) m);
    }
    Py_XDECREF(m->m_self);
    Py_XDECREF(m->m_module);
    if (numfree < PyCFunction_MAXFREELIST) {
        m->m_self = (PyObject *)free_list;
        free_list = m;
        numfree++;
    }
    else {
        PyObject_GC_Del(m);
    }
}

static PyObject *
meth_reduce(PyCFunctionObject *m, PyObject *Py_UNUSED(ignored))
{
    _Py_IDENTIFIER(getattr);

    if (m->m_self == NULL || PyModule_Check(m->m_self))
        return PyUnicode_FromString(m->m_ml->ml_name);

    return Py_BuildValue("N(Os)", _PyEval_GetBuiltinId(&PyId_getattr),
                         m->m_self, m->m_ml->ml_name);
}

static PyMethodDef meth_methods[] = {
    {"__reduce__", (PyCFunction)meth_reduce, METH_NOARGS, NULL},
    {NULL, NULL}
};

static PyObject *
meth_get__text_signature__(PyCFunctionObject *m, void *closure)
{
    return _PyType_GetTextSignatureFromInternalDoc(m->m_ml->ml_name, m->m_ml->ml_doc);
}

static PyObject *
meth_get__doc__(PyCFunctionObject *m, void *closure)
{
    return _PyType_GetDocFromInternalDoc(m->m_ml->ml_name, m->m_ml->ml_doc);
}

static PyObject *
meth_get__name__(PyCFunctionObject *m, void *closure)
{
    return PyUnicode_FromString(m->m_ml->ml_name);
}

static PyObject *
meth_get__qualname__(PyCFunctionObject *m, void *closure)
{
    /* If __self__ is a module or NULL, return m.__name__
       (e.g. len.__qualname__ == 'len')

       If __self__ is a type, return m.__self__.__qualname__ + '.' + m.__name__
       (e.g. dict.fromkeys.__qualname__ == 'dict.fromkeys')

       Otherwise return type(m.__self__).__qualname__ + '.' + m.__name__
       (e.g. [].append.__qualname__ == 'list.append') */
    PyObject *type, *type_qualname, *res;
    _Py_IDENTIFIER(__qualname__);

    if (m->m_self == NULL || PyModule_Check(m->m_self))
        return PyUnicode_FromString(m->m_ml->ml_name);

    type = PyType_Check(m->m_self) ? m->m_self : (PyObject*)Py_TYPE(m->m_self);

    type_qualname = _PyObject_GetAttrId(type, &PyId___qualname__);
    if (type_qualname == NULL)
        return NULL;

    if (!PyUnicode_Check(type_qualname)) {
        PyErr_SetString(PyExc_TypeError, "<method>.__class__."
                        "__qualname__ is not a unicode object");
        Py_XDECREF(type_qualname);
        return NULL;
    }

    res = PyUnicode_FromFormat("%S.%s", type_qualname, m->m_ml->ml_name);
    Py_DECREF(type_qualname);
    return res;
}

static int
meth_traverse(PyCFunctionObject *m, visitproc visit, void *arg)
{
    Py_VISIT(m->m_self);
    Py_VISIT(m->m_module);
    return 0;
}

static PyObject *
meth_get__self__(PyCFunctionObject *m, void *closure)
{
    PyObject *self;

    self = PyCFunction_GET_SELF(m);
    if (self == NULL)
        self = Py_None;
    Py_INCREF(self);
    return self;
}

static PyGetSetDef meth_getsets [] = {
    {"__doc__",  (getter)meth_get__doc__,  NULL, NULL},
    {"__name__", (getter)meth_get__name__, NULL, NULL},
    {"__qualname__", (getter)meth_get__qualname__, NULL, NULL},
    {"__self__", (getter)meth_get__self__, NULL, NULL},
    {"__text_signature__", (getter)meth_get__text_signature__, NULL, NULL},
    {0}
};

#define OFF(x) offsetof(PyCFunctionObject, x)

static PyMemberDef meth_members[] = {
    {"__module__",    T_OBJECT,     OFF(m_module), PY_WRITE_RESTRICTED},
    {NULL}
};

static PyObject *
meth_repr(PyCFunctionObject *m)
{
    if (m->m_self == NULL || PyModule_Check(m->m_self))
        return PyUnicode_FromFormat("<built-in function %s>",
                                   m->m_ml->ml_name);
    return PyUnicode_FromFormat("<built-in method %s of %s object at %p>",
                               m->m_ml->ml_name,
                               m->m_self->ob_type->tp_name,
                               m->m_self);
}

static PyObject *
meth_richcompare(PyObject *self, PyObject *other, int op)
{
    PyCFunctionObject *a, *b;
    PyObject *res;
    int eq;

    if ((op != Py_EQ && op != Py_NE) ||
        !PyCFunction_Check(self) ||
        !PyCFunction_Check(other))
    {
        Py_RETURN_NOTIMPLEMENTED;
    }
    a = (PyCFunctionObject *)self;
    b = (PyCFunctionObject *)other;
    eq = a->m_self == b->m_self;
    if (eq)
        eq = a->m_ml->ml_meth == b->m_ml->ml_meth;
    if (op == Py_EQ)
        res = eq ? Py_True : Py_False;
    else
        res = eq ? Py_False : Py_True;
    Py_INCREF(res);
    return res;
}

static Py_hash_t
meth_hash(PyCFunctionObject *a)
{
    Py_hash_t x, y;
    x = _Py_HashPointer(a->m_self);
    y = _Py_HashPointer((void*)(a->m_ml->ml_meth));
    x ^= y;
    if (x == -1)
        x = -2;
    return x;
}


PyTypeObject PyCFunction_Type = {
    PyVarObject_HEAD_INIT(&PyType_Type, 0)
    "builtin_function_or_method",
    sizeof(PyCFunctionObject),
    0,
    (destructor)meth_dealloc,                   /* tp_dealloc */
    offsetof(PyCFunctionObject, vectorcall),    /* tp_vectorcall_offset */
    0,                                          /* tp_getattr */
    0,                                          /* tp_setattr */
    0,                                          /* tp_as_async */
    (reprfunc)meth_repr,                        /* tp_repr */
    0,                                          /* tp_as_number */
    0,                                          /* tp_as_sequence */
    0,                                          /* tp_as_mapping */
    (hashfunc)meth_hash,                        /* tp_hash */
    PyCFunction_Call,                           /* tp_call */
    0,                                          /* tp_str */
    PyObject_GenericGetAttr,                    /* tp_getattro */
    0,                                          /* tp_setattro */
    0,                                          /* tp_as_buffer */
    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
    _Py_TPFLAGS_HAVE_VECTORCALL,                /* tp_flags */
    0,                                          /* tp_doc */
    (traverseproc)meth_traverse,                /* tp_traverse */
    0,                                          /* tp_clear */
    meth_richcompare,                           /* tp_richcompare */
    offsetof(PyCFunctionObject, m_weakreflist), /* tp_weaklistoffset */
    0,                                          /* tp_iter */
    0,                                          /* tp_iternext */
    meth_methods,                               /* tp_methods */
    meth_members,                               /* tp_members */
    meth_getsets,                               /* tp_getset */
    0,                                          /* tp_base */
    0,                                          /* tp_dict */
};

/* Clear out the free list */

int
PyCFunction_ClearFreeList(void)
{
    int freelist_size = numfree;

    while (free_list) {
        PyCFunctionObject *v = free_list;
        free_list = (PyCFunctionObject *)(v->m_self);
        PyObject_GC_Del(v);
        numfree--;
    }
    assert(numfree == 0);
    return freelist_size;
}

void
PyCFunction_Fini(void)
{
    (void)PyCFunction_ClearFreeList();
}

/* Print summary info about the state of the optimized allocator */
void
_PyCFunction_DebugMallocStats(FILE *out)
{
    _PyDebugAllocatorStats(out,
                           "free PyCFunctionObject",
                           numfree, sizeof(PyCFunctionObject));
}


/* Vectorcall functions for each of the PyCFunction calling conventions,
 * except for METH_VARARGS (possibly combined with METH_KEYWORDS) which
 * doesn't use vectorcall.
 *
 * First, common helpers
 */
static const char *
get_name(PyObject *func)
{
    assert(PyCFunction_Check(func));
    PyMethodDef *method = ((PyCFunctionObject *)func)->m_ml;
    return method->ml_name;
}

typedef void (*funcptr)(void);

static inline int
cfunction_check_kwargs(PyObject *func, PyObject *kwnames)
{
    assert(!PyErr_Occurred());
    assert(PyCFunction_Check(func));
    if (kwnames && PyTuple_GET_SIZE(kwnames)) {
        PyErr_Format(PyExc_TypeError,
                     "%.200s() takes no keyword arguments", get_name(func));
        return -1;
    }
    return 0;
}

static inline funcptr
cfunction_enter_call(PyObject *func)
{
    if (Py_EnterRecursiveCall(" while calling a Python object")) {
        return NULL;
    }
    return (funcptr)PyCFunction_GET_FUNCTION(func);
}

/* Now the actual vectorcall functions */
static PyObject *
cfunction_vectorcall_FASTCALL(
    PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames)
{
    if (cfunction_check_kwargs(func, kwnames)) {
        return NULL;
    }
    Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
    _PyCFunctionFast meth = (_PyCFunctionFast)
                            cfunction_enter_call(func);
    if (meth == NULL) {
        return NULL;
    }
    PyObject *result = meth(PyCFunction_GET_SELF(func), args, nargs);
    Py_LeaveRecursiveCall();
    return result;
}

static PyObject *
cfunction_vectorcall_FASTCALL_KEYWORDS(
    PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames)
{
    Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
    _PyCFunctionFastWithKeywords meth = (_PyCFunctionFastWithKeywords)
                                        cfunction_enter_call(func);
    if (meth == NULL) {
        return NULL;
    }
    PyObject *result = meth(PyCFunction_GET_SELF(func), args, nargs, kwnames);
    Py_LeaveRecursiveCall();
    return result;
}

static PyObject *
cfunction_vectorcall_NOARGS(
    PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames)
{
    if (cfunction_check_kwargs(func, kwnames)) {
        return NULL;
    }
    Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
    if (nargs != 0) {
        PyErr_Format(PyExc_TypeError,
            "%.200s() takes no arguments (%zd given)", get_name(func), nargs);
        return NULL;
    }
    PyCFunction meth = (PyCFunction)cfunction_enter_call(func);
    if (meth == NULL) {
        return NULL;
    }
    PyObject *result = meth(PyCFunction_GET_SELF(func), NULL);
    Py_LeaveRecursiveCall();
    return result;
}

static PyObject *
cfunction_vectorcall_O(
    PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames)
{
    if (cfunction_check_kwargs(func, kwnames)) {
        return NULL;
    }
    Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
    if (nargs != 1) {
        PyErr_Format(PyExc_TypeError,
            "%.200s() takes exactly one argument (%zd given)",
            get_name(func), nargs);
        return NULL;
    }
    PyCFunction meth = (PyCFunction)cfunction_enter_call(func);
    if (meth == NULL) {
        return NULL;
    }
    PyObject *result = meth(PyCFunction_GET_SELF(func), args[0]);
    Py_LeaveRecursiveCall();
    return result;
}

Coverage Report

Created: 2025-10-27 06:40

Line	Count	Source
1
2		/* Method object implementation */
3
4		#include "Python.h"
5		#include "pycore_object.h"
6		#include "pycore_pymem.h"
7		#include "pycore_pystate.h"
8		#include "structmember.h"
9
10		/* Free list for method objects to safe malloc/free overhead
11		* The m_self element is used to chain the objects.
12		*/
13		static PyCFunctionObject *free_list = NULL;
14		static int numfree = 0;
15		#ifndef PyCFunction_MAXFREELIST
16	8.84k	#define PyCFunction_MAXFREELIST 256
17		#endif
18
19		/* undefine macro trampoline to PyCFunction_NewEx */
20		#undef PyCFunction_New
21
22		/* Forward declarations */
23		static PyObject * cfunction_vectorcall_FASTCALL(
24		PyObject func, PyObject const args, size_t nargsf, PyObject kwnames);
25		static PyObject * cfunction_vectorcall_FASTCALL_KEYWORDS(
26		PyObject func, PyObject const args, size_t nargsf, PyObject kwnames);
27		static PyObject * cfunction_vectorcall_NOARGS(
28		PyObject func, PyObject const args, size_t nargsf, PyObject kwnames);
29		static PyObject * cfunction_vectorcall_O(
30		PyObject func, PyObject const args, size_t nargsf, PyObject kwnames);
31
32
33		PyObject *
34		PyCFunction_New(PyMethodDef ml, PyObject self)
35	0	{
36	0	return PyCFunction_NewEx(ml, self, NULL);
37	0	}
38
39		PyObject *
40		PyCFunction_NewEx(PyMethodDef ml, PyObject self, PyObject *module)
41	16.8k	{
42		/* Figure out correct vectorcall function to use */
43	16.8k	vectorcallfunc vectorcall;
44	16.8k	switch (ml->ml_flags & (METH_VARARGS \| METH_FASTCALL \| METH_NOARGS \| METH_O \| METH_KEYWORDS))
45	16.8k	{
46	1.70k	case METH_VARARGS:
47	4.40k	case METH_VARARGS \| METH_KEYWORDS:
48		/* For METH_VARARGS functions, it's more efficient to use tp_call
49		* instead of vectorcall. */
50	4.40k	vectorcall = NULL;
51	4.40k	break;
52	1.39k	case METH_FASTCALL:
53	1.39k	vectorcall = cfunction_vectorcall_FASTCALL;
54	1.39k	break;
55	3.18k	case METH_FASTCALL \| METH_KEYWORDS:
56	3.18k	vectorcall = cfunction_vectorcall_FASTCALL_KEYWORDS;
57	3.18k	break;
58	5.26k	case METH_NOARGS:
59	5.26k	vectorcall = cfunction_vectorcall_NOARGS;
60	5.26k	break;
61	2.58k	case METH_O:
62	2.58k	vectorcall = cfunction_vectorcall_O;
63	2.58k	break;
64	0	default:
65	0	PyErr_Format(PyExc_SystemError,
66	0	"%s() method: bad call flags", ml->ml_name);
67	0	return NULL;
68	16.8k	}
69
70	16.8k	PyCFunctionObject *op;
71	16.8k	op = free_list;
72	16.8k	if (op != NULL) {
73	8.84k	free_list = (PyCFunctionObject *)(op->m_self);
74	8.84k	(void)PyObject_INIT(op, &PyCFunction_Type);
75	8.84k	numfree--;
76	8.84k	}
77	7.98k	else {
78	7.98k	op = PyObject_GC_New(PyCFunctionObject, &PyCFunction_Type);
79	7.98k	if (op == NULL)
80	0	return NULL;
81	7.98k	}
82	16.8k	op->m_weakreflist = NULL;
83	16.8k	op->m_ml = ml;
84	16.8k	Py_XINCREF(self);
85	16.8k	op->m_self = self;
86	16.8k	Py_XINCREF(module);
87	16.8k	op->m_module = module;
88	16.8k	op->vectorcall = vectorcall;
89	16.8k	_PyObject_GC_TRACK(op);
90	16.8k	return (PyObject *)op;
91	16.8k	}
92
93		PyCFunction
94		PyCFunction_GetFunction(PyObject *op)
95	0	{
96	0	if (!PyCFunction_Check(op)) {
97	0	PyErr_BadInternalCall();
98	0	return NULL;
99	0	}
100	0	return PyCFunction_GET_FUNCTION(op);
101	0	}
102
103		PyObject *
104		PyCFunction_GetSelf(PyObject *op)
105	0	{
106	0	if (!PyCFunction_Check(op)) {
107	0	PyErr_BadInternalCall();
108	0	return NULL;
109	0	}
110	0	return PyCFunction_GET_SELF(op);
111	0	}
112
113		int
114		PyCFunction_GetFlags(PyObject *op)
115	0	{
116	0	if (!PyCFunction_Check(op)) {
117	0	PyErr_BadInternalCall();
118	0	return -1;
119	0	}
120	0	return PyCFunction_GET_FLAGS(op);
121	0	}
122
123		/* Methods (the standard built-in methods, that is) */
124
125		static void
126		meth_dealloc(PyCFunctionObject *m)
127	8.84k	{
128	8.84k	_PyObject_GC_UNTRACK(m);
129	8.84k	if (m->m_weakreflist != NULL) {
130	0	PyObject_ClearWeakRefs((PyObject*) m);
131	0	}
132	8.84k	Py_XDECREF(m->m_self);
133	8.84k	Py_XDECREF(m->m_module);
134	8.84k	if (numfree < PyCFunction_MAXFREELIST) {
135	8.84k	m->m_self = (PyObject *)free_list;
136	8.84k	free_list = m;
137	8.84k	numfree++;
138	8.84k	}
139	0	else {
140	0	PyObject_GC_Del(m);
141	0	}
142	8.84k	}
143
144		static PyObject *
145		meth_reduce(PyCFunctionObject m, PyObject Py_UNUSED(ignored))
146	0	{
147	0	_Py_IDENTIFIER(getattr);
148
149	0	if (m->m_self == NULL \|\| PyModule_Check(m->m_self))
150	0	return PyUnicode_FromString(m->m_ml->ml_name);
151
152	0	return Py_BuildValue("N(Os)", _PyEval_GetBuiltinId(&PyId_getattr),
153	0	m->m_self, m->m_ml->ml_name);
154	0	}
155
156		static PyMethodDef meth_methods[] = {
157		{"__reduce__", (PyCFunction)meth_reduce, METH_NOARGS, NULL},
158		{NULL, NULL}
159		};
160
161		static PyObject *
162		meth_get__text_signature__(PyCFunctionObject m, void closure)
163	0	{
164	0	return _PyType_GetTextSignatureFromInternalDoc(m->m_ml->ml_name, m->m_ml->ml_doc);
165	0	}
166
167		static PyObject *
168		meth_get__doc__(PyCFunctionObject m, void closure)
169	0	{
170	0	return _PyType_GetDocFromInternalDoc(m->m_ml->ml_name, m->m_ml->ml_doc);
171	0	}
172
173		static PyObject *
174		meth_get__name__(PyCFunctionObject m, void closure)
175	0	{
176	0	return PyUnicode_FromString(m->m_ml->ml_name);
177	0	}
178
179		static PyObject *
180		meth_get__qualname__(PyCFunctionObject m, void closure)
181	0	{
182		/* If __self__ is a module or NULL, return m.__name__
183		(e.g. len.__qualname__ == 'len')
184
185		If __self__ is a type, return m.__self__.__qualname__ + '.' + m.__name__
186		(e.g. dict.fromkeys.__qualname__ == 'dict.fromkeys')
187
188		Otherwise return type(m.__self__).__qualname__ + '.' + m.__name__
189		(e.g. [].append.__qualname__ == 'list.append') */
190	0	PyObject type, type_qualname, *res;
191	0	_Py_IDENTIFIER(__qualname__);
192
193	0	if (m->m_self == NULL \|\| PyModule_Check(m->m_self))
194	0	return PyUnicode_FromString(m->m_ml->ml_name);
195
196	0	type = PyType_Check(m->m_self) ? m->m_self : (PyObject*)Py_TYPE(m->m_self);
197
198	0	type_qualname = _PyObject_GetAttrId(type, &PyId___qualname__);
199	0	if (type_qualname == NULL)
200	0	return NULL;
201
202	0	if (!PyUnicode_Check(type_qualname)) {
203	0	PyErr_SetString(PyExc_TypeError, "<method>.__class__."
204	0	"__qualname__ is not a unicode object");
205	0	Py_XDECREF(type_qualname);
206	0	return NULL;
207	0	}
208
209	0	res = PyUnicode_FromFormat("%S.%s", type_qualname, m->m_ml->ml_name);
210	0	Py_DECREF(type_qualname);
211	0	return res;
212	0	}
213
214		static int
215		meth_traverse(PyCFunctionObject m, visitproc visit, void arg)
216	16.4k	{
217	16.4k	Py_VISIT(m->m_self);
218	16.4k	Py_VISIT(m->m_module);
219	16.4k	return 0;
220	16.4k	}
221
222		static PyObject *
223		meth_get__self__(PyCFunctionObject m, void closure)
224	1	{
225	1	PyObject *self;
226
227	1	self = PyCFunction_GET_SELF(m);
228	1	if (self == NULL)
229	0	self = Py_None;
230	1	Py_INCREF(self);
231	1	return self;
232	1	}
233
234		static PyGetSetDef meth_getsets [] = {
235		{"__doc__", (getter)meth_get__doc__, NULL, NULL},
236		{"__name__", (getter)meth_get__name__, NULL, NULL},
237		{"__qualname__", (getter)meth_get__qualname__, NULL, NULL},
238		{"__self__", (getter)meth_get__self__, NULL, NULL},
239		{"__text_signature__", (getter)meth_get__text_signature__, NULL, NULL},
240		{0}
241		};
242
243		#define OFF(x) offsetof(PyCFunctionObject, x)
244
245		static PyMemberDef meth_members[] = {
246		{"__module__", T_OBJECT, OFF(m_module), PY_WRITE_RESTRICTED},
247		{NULL}
248		};
249
250		static PyObject *
251		meth_repr(PyCFunctionObject *m)
252	0	{
253	0	if (m->m_self == NULL \|\| PyModule_Check(m->m_self))
254	0	return PyUnicode_FromFormat("<built-in function %s>",
255	0	m->m_ml->ml_name);
256	0	return PyUnicode_FromFormat("<built-in method %s of %s object at %p>",
257	0	m->m_ml->ml_name,
258	0	m->m_self->ob_type->tp_name,
259	0	m->m_self);
260	0	}
261
262		static PyObject *
263		meth_richcompare(PyObject self, PyObject other, int op)
264	0	{
265	0	PyCFunctionObject a, b;
266	0	PyObject *res;
267	0	int eq;
268
269	0	if ((op != Py_EQ && op != Py_NE) \|\|
270	0	!PyCFunction_Check(self) \|\|
271	0	!PyCFunction_Check(other))
272	0	{
273	0	Py_RETURN_NOTIMPLEMENTED;
274	0	}
275	0	a = (PyCFunctionObject *)self;
276	0	b = (PyCFunctionObject *)other;
277	0	eq = a->m_self == b->m_self;
278	0	if (eq)
279	0	eq = a->m_ml->ml_meth == b->m_ml->ml_meth;
280	0	if (op == Py_EQ)
281	0	res = eq ? Py_True : Py_False;
282	0	else
283	0	res = eq ? Py_False : Py_True;
284	0	Py_INCREF(res);
285	0	return res;
286	0	}
287
288		static Py_hash_t
289		meth_hash(PyCFunctionObject *a)
290	618	{
291	618	Py_hash_t x, y;
292	618	x = _Py_HashPointer(a->m_self);
293	618	y = _Py_HashPointer((void*)(a->m_ml->ml_meth));
294	618	x ^= y;
295	618	if (x == -1)
296	0	x = -2;
297	618	return x;
298	618	}
299
300
301		PyTypeObject PyCFunction_Type = {
302		PyVarObject_HEAD_INIT(&PyType_Type, 0)
303		"builtin_function_or_method",
304		sizeof(PyCFunctionObject),
305		0,
306		(destructor)meth_dealloc, /* tp_dealloc */
307		offsetof(PyCFunctionObject, vectorcall), /* tp_vectorcall_offset */
308		0, /* tp_getattr */
309		0, /* tp_setattr */
310		0, /* tp_as_async */
311		(reprfunc)meth_repr, /* tp_repr */
312		0, /* tp_as_number */
313		0, /* tp_as_sequence */
314		0, /* tp_as_mapping */
315		(hashfunc)meth_hash, /* tp_hash */
316		PyCFunction_Call, /* tp_call */
317		0, /* tp_str */
318		PyObject_GenericGetAttr, /* tp_getattro */
319		0, /* tp_setattro */
320		0, /* tp_as_buffer */
321		Py_TPFLAGS_DEFAULT \| Py_TPFLAGS_HAVE_GC \|
322		_Py_TPFLAGS_HAVE_VECTORCALL, /* tp_flags */
323		0, /* tp_doc */
324		(traverseproc)meth_traverse, /* tp_traverse */
325		0, /* tp_clear */
326		meth_richcompare, /* tp_richcompare */
327		offsetof(PyCFunctionObject, m_weakreflist), /* tp_weaklistoffset */
328		0, /* tp_iter */
329		0, /* tp_iternext */
330		meth_methods, /* tp_methods */
331		meth_members, /* tp_members */
332		meth_getsets, /* tp_getset */
333		0, /* tp_base */
334		0, /* tp_dict */
335		};
336
337		/* Clear out the free list */
338
339		int
340		PyCFunction_ClearFreeList(void)
341	0	{
342	0	int freelist_size = numfree;
343
344	0	while (free_list) {
345	0	PyCFunctionObject *v = free_list;
346	0	free_list = (PyCFunctionObject *)(v->m_self);
347	0	PyObject_GC_Del(v);
348	0	numfree--;
349	0	}
350	0	assert(numfree == 0);
351	0	return freelist_size;
352	0	}
353
354		void
355		PyCFunction_Fini(void)
356	0	{
357	0	(void)PyCFunction_ClearFreeList();
358	0	}
359
360		/* Print summary info about the state of the optimized allocator */
361		void
362		_PyCFunction_DebugMallocStats(FILE *out)
363	0	{
364	0	_PyDebugAllocatorStats(out,
365	0	"free PyCFunctionObject",
366	0	numfree, sizeof(PyCFunctionObject));
367	0	}
368
369
370		/* Vectorcall functions for each of the PyCFunction calling conventions,
371		* except for METH_VARARGS (possibly combined with METH_KEYWORDS) which
372		* doesn't use vectorcall.
373		*
374		* First, common helpers
375		*/
376		static const char *
377		get_name(PyObject *func)
378	0	{
379	0	assert(PyCFunction_Check(func));
380	0	PyMethodDef method = ((PyCFunctionObject )func)->m_ml;
381	0	return method->ml_name;
382	0	}
383
384		typedef void (*funcptr)(void);
385
386		static inline int
387		cfunction_check_kwargs(PyObject func, PyObject kwnames)
388	25.8k	{
389	25.8k	assert(!PyErr_Occurred());
390	25.8k	assert(PyCFunction_Check(func));
391	25.8k	if (kwnames && PyTuple_GET_SIZE(kwnames)) {
392	0	PyErr_Format(PyExc_TypeError,
393	0	"%.200s() takes no keyword arguments", get_name(func));
394	0	return -1;
395	0	}
396	25.8k	return 0;
397	25.8k	}
398
399		static inline funcptr
400		cfunction_enter_call(PyObject *func)
401	32.3k	{
402	32.3k	if (Py_EnterRecursiveCall(" while calling a Python object")) {
403	0	return NULL;
404	0	}
405	32.3k	return (funcptr)PyCFunction_GET_FUNCTION(func);
406	32.3k	}
407
408		/* Now the actual vectorcall functions */
409		static PyObject *
410		cfunction_vectorcall_FASTCALL(
411		PyObject func, PyObject const args, size_t nargsf, PyObject kwnames)
412	10.7k	{
413	10.7k	if (cfunction_check_kwargs(func, kwnames)) {
414	0	return NULL;
415	0	}
416	10.7k	Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
417	10.7k	_PyCFunctionFast meth = (_PyCFunctionFast)
418	10.7k	cfunction_enter_call(func);
419	10.7k	if (meth == NULL) {
420	0	return NULL;
421	0	}
422	10.7k	PyObject *result = meth(PyCFunction_GET_SELF(func), args, nargs);
423	10.7k	Py_LeaveRecursiveCall();
424	10.7k	return result;
425	10.7k	}
426
427		static PyObject *
428		cfunction_vectorcall_FASTCALL_KEYWORDS(
429		PyObject func, PyObject const args, size_t nargsf, PyObject kwnames)
430	6.52k	{
431	6.52k	Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
432	6.52k	_PyCFunctionFastWithKeywords meth = (_PyCFunctionFastWithKeywords)
433	6.52k	cfunction_enter_call(func);
434	6.52k	if (meth == NULL) {
435	0	return NULL;
436	0	}
437	6.52k	PyObject *result = meth(PyCFunction_GET_SELF(func), args, nargs, kwnames);
438	6.52k	Py_LeaveRecursiveCall();
439	6.52k	return result;
440	6.52k	}
441
442		static PyObject *
443		cfunction_vectorcall_NOARGS(
444		PyObject func, PyObject const args, size_t nargsf, PyObject kwnames)
445	9.33k	{
446	9.33k	if (cfunction_check_kwargs(func, kwnames)) {
447	0	return NULL;
448	0	}
449	9.33k	Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
450	9.33k	if (nargs != 0) {
451	0	PyErr_Format(PyExc_TypeError,
452	0	"%.200s() takes no arguments (%zd given)", get_name(func), nargs);
453	0	return NULL;
454	0	}
455	9.33k	PyCFunction meth = (PyCFunction)cfunction_enter_call(func);
456	9.33k	if (meth == NULL) {
457	0	return NULL;
458	0	}
459	9.33k	PyObject *result = meth(PyCFunction_GET_SELF(func), NULL);
460	9.33k	Py_LeaveRecursiveCall();
461	9.33k	return result;
462	9.33k	}
463
464		static PyObject *
465		cfunction_vectorcall_O(
466		PyObject func, PyObject const args, size_t nargsf, PyObject kwnames)
467	5.75k	{
468	5.75k	if (cfunction_check_kwargs(func, kwnames)) {
469	0	return NULL;
470	0	}
471	5.75k	Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
472	5.75k	if (nargs != 1) {
473	0	PyErr_Format(PyExc_TypeError,
474	0	"%.200s() takes exactly one argument (%zd given)",
475	0	get_name(func), nargs);
476	0	return NULL;
477	0	}
478	5.75k	PyCFunction meth = (PyCFunction)cfunction_enter_call(func);
479	5.75k	if (meth == NULL) {
480	0	return NULL;
481	0	}
482	5.75k	PyObject *result = meth(PyCFunction_GET_SELF(func), args[0]);
483		Py_LeaveRecursiveCall();
484	5.75k	return result;
485	5.75k	}